EPSG:4120

Greek

Transform Get position on a map

Available transformations
to EPSG:4121
EPSG:4121 - GGRS87

  • Greece - onshore. , accuracy 5.0 m, code 1891 (default)

Selected transformation

Method: Geographic2D offsets

Remarks: More accurate polynomial transformations between Greek / Hatt projection zones and GGRS87 / Greek Grid are available from the Military Geographic Service.

Information source: Hellenic Petroleum

Revision date: 2011-07-20

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Greek

Datum: Greek

Ellipsoid: Bessel 1841

Prime meridian: Greenwich

Data source: EPSG

Information source: Topography Department; National Technical University of Greece.

Revision date: 2011-07-20

Scope: Geodesy.

Area of use: Greece - onshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
23.93 38.31

WGS84 bounds:
19.57 34.88
28.3 41.75

Greece - onshore.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        GEOGCRS["Greek",
            DATUM["Greek",
                ELLIPSOID["Bessel 1841",6377397.155,299.1528128,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Geodesy."],
                AREA["Greece - onshore."],
                BBOX[34.88,19.57,41.75,28.3]],
            ID["EPSG",4120]]],
    TARGETCRS[
        GEOGCRS["GGRS87",
            DATUM["Greek Geodetic Reference System 1987",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Geodesy."],
                AREA["Greece - onshore."],
                BBOX[34.88,19.57,41.75,28.3]],
            ID["EPSG",4121]]],
    ABRIDGEDTRANSFORMATION["Greek to GGRS87 (1)",
        METHOD["Geographic2D offsets",
            ID["EPSG",9619]],
        PARAMETER["Latitude offset",-5.86,
            ID["EPSG",8601]],
        PARAMETER["Longitude offset",0.28,
            ID["EPSG",8602]],
        USAGE[
            SCOPE["Transformation of coordinates at 5m level of accuracy."],
            AREA["Greece - onshore."],
            BBOX[34.88,19.57,41.75,28.3]],
        ID["EPSG",1891],
        REMARK["More accurate polynomial transformations between Greek / Hatt projection zones and GGRS87 / Greek Grid are available from the Military Geographic Service."]]]

Definition: PROJ.4

+proj=longlat +ellps=bessel +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4120","+proj=longlat +ellps=bessel +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "Greek",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Greek",
            "ellipsoid": {
                "name": "Bessel 1841",
                "semi_major_axis": 6377397.155,
                "inverse_flattening": 299.1528128
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4120
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "GGRS87",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Greek Geodetic Reference System 1987",
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4121
        }
    },
    "transformation": {
        "name": "Greek to GGRS87 (1)",
        "method": {
            "name": "Geographic2D offsets",
            "id": {
                "authority": "EPSG",
                "code": 9619
            }
        },
        "parameters": [
            {
                "name": "Latitude offset",
                "value": -5.86,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8601
                }
            },
            {
                "name": "Longitude offset",
                "value": 0.28,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8602
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1891
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=bessel"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=bessel +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=bessel +no_defs +type=crs">
	</Layer>
</Map>